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: http://xmm.vilspa.esa.es/sas/7.1.0/doc/evproject/node6.html
Дата изменения: Mon Jul 9 04:02:13 2007 Дата индексирования: Sat Dec 22 11:04:09 2007 Кодировка: Поисковые слова: vallis |
The projection direction (ie, the direction of the point at which the projection plane is tangent to the celestial sphere) is user-selectable from the following alternatives, chosen via the parameter tangdirstyle:
As said in the introduction, the `pixel size' of the X and Y values is fixed at 0.05 arcsec; the remaining thing to be specified is the maximum allowed X and Y values. This is specified in a somewhat roundabout way via the parameter imagesize, which specifies the total half-width and/or half-height of the projection plane in decimal degrees. After offsetting by imagesize, X and Y can therefore run from 1 to imagesize .
XMM-Newton SOC/SSC -- 2007-07-09